Investments in Equity Securities (Summary of Financial Data) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Sep. 30, 2023	Sep. 30, 2022
Schedule of Equity Method Investments [Line Items]
Net revenues	$ 24,483	$ 25,096	$ 26,013
Gross profit	14,284	14,246	13,992
Earnings (losses) from continuing operations	10,928	7,389	3,824
Net earnings (losses)	8,130	5,764	2,475
Current assets	5,585	7,220
Current liabilities	11,319	8,616
ABI [Member]
Schedule of Equity Method Investments [Line Items]
Net revenues	59,841	57,267	52,864
Gross profit	32,371	31,588	30,653
Earnings (losses) from continuing operations	7,956	7,879	7,434
Net earnings (losses)	7,956	7,879	7,434
Net earnings (losses) attributable to equity investments	6,284	5,838	5,780
Current assets				$ 22,835	$ 24,164
Long-term assets				188,003	182,087
Current liabilities				35,407	32,649
Long-term liabilities				91,791	96,497
Noncontrolling interests				11,231	11,778
Other Investments [Member]
Schedule of Equity Method Investments [Line Items]
Net revenues	87
Gross profit	9
Earnings (losses) from continuing operations	(105)
Net earnings (losses)	(108)
Net earnings (losses) attributable to equity investments	$ (108)
Current assets				918	963
Long-term assets				232	274
Current liabilities				31	38
Long-term liabilities				3	8
Noncontrolling interests				$ (3)	$ (3)
JUUL and Cronos
Schedule of Equity Method Investments [Line Items]
Net revenues		947	1,313
Gross profit		525	757
Earnings (losses) from continuing operations		(521)	(800)
Net earnings (losses)		(521)	(800)
Net earnings (losses) attributable to equity investments		$ (520)	$ (798)